I would order them like this...

Little Boots, Lykke Li, Annie, Robyn

.... Since admitting that you have a problem is the first step to recovery, I feel that I must talk about this and get it out in the open.  My heart is a flutter.  What can a man do?  Scandinavia alone has produced the likes of Robyn,Annie, andLykke Li.  Now out of Black Pool UK comes Little Boots.  I recently decided that I would try and refuse her charms.  Then I ran right smack into her YouTube channel. 

...

http://www.urb.com/permalink/4584/Robyn-%3E-Annie-%3E-Lykke-Li-%3E-Little-Boots.html